Measurement-While-Drilling (MWD) development for air drilling

Conference · Fri Dec 31 04:00:00 UTC 1993

OSTI ID:10128272

Harrison, W A; Rubin, L A

When downhole contact between the BHA and formation was optimum, as it was during rotation, high signal levels were experienced. Survey data acquired at the connections, when the BHA was totally at rest, is excellent. GEC intends modifying the system to optimize operations consistent with these disparate factors. A Mean-Time-To-Failure (MTTF) of 89.9 hours appears reasonable from the data. It is not possible to infer an MTBF figure from this test. It is quite obvious, however, that the system reliability performance has been significantly improved since FT {number_sign}5 was performed almost two years earlier. Based on the above results, GEC concludes that it is certainly feasible to attain 100 hours MTBF, for the Model 27, in any and all situations, and hence to provide a reliable MWD for air-drilling.

• Research Organization: Geoscience Electronics Corp., Westlake Village, CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC21-88MC25105
• OSTI ID: 10128272
• Report Number(s): DOE/MC/25105--94/C0302; CONF-931156--35; ON: DE94007311; BR: AB0505050/AB0520000
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030300
DRILLING, PRODUCTION, AND PROCESSING
MWD SYSTEMS
PERCUSSIVE DRILLS
RELIABILITY
WELL DRILLING